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@dsp-ant dsp-ant released this 03 Jan 16:20
· 11 commits to main since this release
v1.2.0
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dsp-ant David Soria Parra
SSH Key Fingerprint: AvNCPpH1aXy5v5ldJF5zdOFy/OAxfdqywK5Db1DUL58 Learn about vigilant mode.
af940ae
This commit was signed with the committer’s verified signature.
dsp-ant David Soria Parra
SSH Key Fingerprint: AvNCPpH1aXy5v5ldJF5zdOFy/OAxfdqywK5Db1DUL58 Learn about vigilant mode.

A big thank you to @jlowin for the creation of the fantastic FastMCP, which is now included into the MCP SDK.

Backwards Compatibility

This release is semver compatible. Existing code will continue to work, unless code relied on re-experts from mcp.server. Version 2.0 of the SDK will remove the use of mcp.server.Server in favour of mcp.server.lowlevel.Server. To stay compatible with upcoming major versions, please change from mcp.server import Server to from mcp.server.lowlevel import Server.

Major Features

FastMCP Integration

  • Integrated FastMCP as the recommended high-level server framework
  • Added new mcp.server.fastmcp module with simplified decorator-based API
  • Introduced FastMCP class for easier server creation and management
  • Added comprehensive documentation and examples for FastMCP usage

New CLI Package

  • Added new CLI package for improved developer experience
  • Introduced mcp dev command for local development and testing
  • Added mcp install command for Claude Desktop integration
  • Added mcp run command for direct server execution

Improvements

Documentation

  • Completely revamped README with new structure and examples
  • Added detailed sections on core concepts (Resources, Tools, Prompts)
  • Updated documentation to recommend FastMCP as primary API
  • Added sections on development workflow and deployment options
  • Improved example server documentation

Developer Experience

  • Added pre-commit hooks for code quality
  • Updated to Pydantic 2.10.0 for improved type checking
  • Added uvicorn as a dependency for better server capabilities

Bug Fixes

  • Fixed encoding errors in STDIO client (@SecretiveShell)
  • Fixed deprecation warnings in core components
  • Fixed Pydantic field handling for meta fields
  • Fixed type issues throughout the codebase
  • Fixed example server READMEs
  • Added constructor for McpError to allow setting fields (@allenporter)

Breaking Changes

  • Deprecated direct usage of mcp.server in favor of mcp.server.fastmcp
  • Updated import paths for FastMCP integration
  • Changed recommended installation to include CLI features (pip install "mcp[cli]")

Contributors

Special thanks to all contributors who made this release possible, including:

Full Changelog: v1.1.3...v1.2.0

Contributors

jlowin, allenporter, and 2 other contributors
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